4 Stackable Art Deco Tiffany & Co Platinum Ruby Sapphire Eternity Bands c.1930. The rings are in great antique estate condition and ready to wear. Two of the rings were sized at one point previously which made their hallmarks blurry. The hallmarks on the other two are still very clear. The hallmark reads "Tiffany & Co PLAT". Each ring is set with approximately 1.5 carats of either natural rubies or natural blue sapphires all Square Stepcuts. The rings range in size from 5.25 - 5.5. They measure about 2.75mm wide x 2.25" thick. The entire set of 4 rings weighs a total of 11.6 grams.